--- a/media/webrtc/signaling/gtest/jsep_session_unittest.cpp
+++ b/media/webrtc/signaling/gtest/jsep_session_unittest.cpp
@@ -921,22 +921,18 @@ protected:
     }
   }
 
   void CheckPairs(const JsepSession& session, const std::string& context)
   {
     auto pairs = session.GetNegotiatedTrackPairs();
 
     for (JsepTrackPair& pair : pairs) {
-      if (types.size() == 1) {
-        ASSERT_FALSE(pair.HasBundleLevel()) << context;
-      } else {
-        ASSERT_TRUE(pair.HasBundleLevel()) << context;
-        ASSERT_EQ(0U, pair.BundleLevel()) << context;
-      }
+      ASSERT_TRUE(pair.HasBundleLevel()) << context;
+      ASSERT_EQ(0U, pair.BundleLevel()) << context;
     }
   }
 
   void
   DisableMsid(std::string* sdp) const {
     size_t pos = sdp->find("a=msid-semantic");
     ASSERT_NE(std::string::npos, pos);
     (*sdp)[pos + 2] = 'X'; // garble, a=Xsid-semantic

--- a/media/webrtc/signaling/src/jsep/JsepSessionImpl.cpp
+++ b/media/webrtc/signaling/src/jsep/JsepSessionImpl.cpp
@@ -670,17 +670,17 @@ JsepSessionImpl::SetupBundle(Sdp* sdp) c
         // Set port to 0 for sections with bundle-only attribute. (mjf)
         sdp->GetMediaSection(i).SetPort(0);
       }
 
       mids.push_back(attrs.GetMid());
     }
   }
 
-  if (mids.size() > 1) {
+  if (mids.size() >= 1) {
     UniquePtr<SdpGroupAttributeList> groupAttr(new SdpGroupAttributeList);
     groupAttr->PushEntry(SdpGroupAttributeList::kBundle, mids);
     sdp->GetAttributeList().SetAttribute(groupAttr.release());
   }
 }
 
 nsresult
 JsepSessionImpl::GetRemoteIds(const Sdp& sdp,